A British sniper currently holds the publicly known record for a confirmed kill shot. As a Corporal of Horse in the British Army, Craig Harrison used a .338 caliber L115A3 Long Range Rifle to shoot a man from 2,707 yards (1.54 miles) in Afghanistan in 2009.
Variability is a measure of the spread of a data set. Learn more about the different measures of variability including the range, variance, and standard deviation, and how they are used in the field of Psychology.
Standard Deviation (Volatility) Standard deviation is a statistical term that measures the amount of variability or dispersion around an average. Standard deviation is also a measure of volatility. Generally speaking, dispersion is the difference between the actual value and the average value. The larger this dispersion or variability is, the higher the standard deviation. The smaller this dispersion or variability is, the lower the standard deviation.